I changed my Internet download settings for all downloaded files to go to my desktop. Then from there I can just put them wherever I want. In the case of books, I'll download the book, then open Calibre and do "Add Books." Then I just have to add the books from the desktop and it eliminates searching my computer for the folder they're in. Since Calibre copies the book into its own library folder, I then delete the books from my desktop. It sounds like this kind of system might make your life a bit easier also.
